Auxiliary battery charging terminal

Abstract

In accordance with the present invention there is provided an auxiliary battery charging terminal that may selectively engage battery charging circuitry inside a portable radio pager. There is provided a current conducting cap having a downwardly and outwardly flared rim that deforms to lock under the crimped edge an insulating seal ring of a standard rechargeable cell by application of a compressive axial force. The auxiliary battery charging terminal is further provided with a central tip axially projecting upwardly from the cap. The auxiliary terminal may be further provided with a cap of reduced diameter to circumferentially engage the raised battery cathode terminal on the battery cell. A mating recess in a remote battery charging receptacle may receive the tip to captivate the battery cell against lateral displacement. The tip may be further provided with a rounded apex to relieve localized frictional forces upon insertion and removal of the battery cell from the remote battery charging receptacle.

What we claim and desire to secure by Letters Patent is: 
     
       1. An improved rechargeable battery cell for selectively, electrically engaging charging circuitry comprising: a cathode disk having a periphery and a projecting tip means for selectively, electrically engaging charging circuitry;   an anode jacket mechanically captivating said cathode disk periphery about a battery cell; and   an electrically insulating seal ring therebetween,   whereby said projecting tip electrically engages said charging circuitry, whereas said charging circuitry is not engaged in the absence of said projecting tip and   whereby said tip is axially constrained against lateral displacement within a battery charging receptacle.   
     
     
       2. An improved rechargeable battery cell with an auxiliary battery charging tip for selectively, electrically engaging charging circuitry comprising, in combination: a rechargeable battery cell having a cathode disk further having a periphery and a raised cathode button, an anode jacket mechanically captivating said cathode disk periphery about a battery cell and an electrically insulating seal ring therebetween, and   a current conducting cap, dimensioned to conductively engage said raised cathode button and having a downwardly flared rim adapted to be received under said insulating seal ring and having a tip axially projecting upwardly for selectively, electrically engaging charging circuitry,   whereby said projecting tip electrically engages said charging circuitry, whereas said charging circuitry is not engaged in the absence of said projecting tip and   whereby said tip is axially constrained against lateral displacement within a battery charging receptacle.   
     
     
       3. An auxiliary battery charging tip as claimed in claim 2, wherein said flared rim is downwardly and outwardly flared. 
     
     
       4. An auxiliary battery charging tip as claimed in claim 2, wherein said flared rim is deformable whereby the deformable rim may be yieldably urged under the battery seal ring. 
     
     
       5. An auxiliary battery charging tip as claimed in claim 20, wherein said cap is reduced in diameter to circumferentially engage said raised battery button. 
     
     
       6. An auxiliary battery charging tip as claimed in claim 5, wherein said diameter reduction further comprises a plurality of detents about the cap circumference. 
     
     
       7. An apparatus as claimed in claim 1 or 2, wherein said upwardly projecting axial tip is centrally disposed. 
     
     
       8. An apparatus as claimed in claim 1 or 2, wherein said tip has a rounded apex.